Power lawn mower



Nov. 18, 1941.

R. J. SEJKORA POWER LAWN MOWER Filed June 20, 1939 4 Sheets-Sheet lInventor i scfj i'ora fi nwm MMM Aiiornens Nov; 18, 1941. R. J. SEJKORA2,263,368

POWER LAWN MOWER Filed June 20, 1959 4 Sheets-Sheet 2 Inventor 1i. JSig/K A tiorneys 1941- R. J. SEJKORA POWER LAWN MOWER 4 Sheds-Sheet 5Filed June 20, 1959 Inventor 12 .js -z m,

'1 Hmneys Nov. 18, 1941. R. J. SEJKORA 2,263,368

POWER LAWN MOWER Filed June 20, 1939 4 Sheets-Sheet 4 III III A itorneysPatented Nov. 18, 1941 2,2 3,368 POWER MOWER fhudo l ph Joseph Sejkora,Chapman, Application June 20, 1939; Serial No. 280.174

mm. louse-44) This" invention appertains' to new and useful improvementsin lawn mowers and more 'particularly to mowers of the'power driventype.

The principal object 'of the present invention is to provide'apowerdriven lawnmower which will not, only cut grass of medium height. but

also substantially high standing weeds.

The secondary object of the invention is The cranks An arm 22 issuitably secured the rear axle 13 adjacent the corresponding journalsleeve l5 and from this arm 22 extends the bar 23 to con- 7 nect to thelower end of the hand lever 24, which provide a machine of the characterstated which can be readily adjusted to meet varying conditions.

A third object of the invention is to provide a machine of the characterstated which is of sturdy construction and not susceptible to the readydevelopment of defects.

In the drawings:

Figure 1 is a side elevational view of the entire machine.

Figure 2 is a rear elevational view. Figure 3 is,a top plan-view of thechassis.

Figure 4 is a fragmentary top plan view showing one corner of thechassis frame.

Figure 5 is a fragmentary vertical sectional view through one corner ofthe chassis-frame.

Figure 6 is a perspective view of one of the axle bearings.

Figure 7 is a plan view of the guard.

Figure'8 is a perspective viewof one of the axles.

Figure 9 is a perspective view of one of the axle connecting bars.

Figure 10 is a vertical sectional view through the gear assembly.

- Figure 11 is a plan view of the cutting unit.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that the machine includes the frame generally referred to bynumeral 5, made up of the angle opening I0 therein through which thedriven shaft H is disposed.

Each corner of the frame 5 has a vertically disposed barrel l2 welded orotherwise securedthereto. Numerals l3 and I4 represent the axles of thevehicle which extend through sleeves and these sleeves have upstandingstems spindles l6 disposed upwardly through the aforementioned barrelsl2. Washers 11 are provided on the upper portions of the spindles l6 andcotter keys I8 are disposed through the upper ends of the spindles l6.

As can be seen in Figure 2, the axles l3 and have crank ends I9terminating in stub spindles on which the wheels 20 are mounted.

has a detent 25 thereon cooperative with-the segmental: rack 26, thelatter being'secured to the edge-of the platform 21, thisplatform beingmounted upon the aforementioned frame 5.

Mounted upon the platform 21 isa conventional type'of gasoline enginegenerally. referred to by numeral 28 and of the type usually used inconjunction with lawn. mowers. Numeral 29 representsthe drive pulley ofthismotor which operates the belt 30, the latter belng'trained over thepulley 3| on the shaft 32. This shaft 32 is journaled through thebearing 33 which is at one side of the gear box 34.' The gear box 34 isI supported by the pedestal 35, bored to accommodate the driven shaft.The shaft:32 extends through the gear 'box34 and is equippedwith thebeveled pinion 36 meshing with-thebeveled gear 31, the latter beinglocated on the upper end of the driven shaft ll.

Disposed on the shoulder portion 38 of the shaft II is the cutter disk39 and anut on this shaft prevents displacement of the cutter .disk- 39.

Cutter blades 40 are secured to the disk 39 at degree intervals. Asshown inFigure 11, an extra set of openings 4| are formedin the disk 39in alignment with one of the other sets I of openings so that in theevent only two cutter blades 40 are desired, oneofthe blades 49fcan beremoved into the location of the. opening 4| while the other blade outof alignmentgcan'be removed.

A pair of bars rear end of the platform 21 and are "attached to thehandle structure 43. Brace bars 44 extend from the handle structureand-connect to the top of the platform 21 forwardlyof the rear endthereof. 1 4

At the forward end of the platform 21 is a guard structure generallyreferred to by numeral 45 and this inclines upwardly in a forwarddirection as shown in Figure 1. This guard consists of thesubstantiallyU-shaped frame 46 having its end portions secured to the platform 21 andthe grill work 41 installed therein.

When the device is to be operated the same is pushed over the surfaceupon which the grass or other vegetation is to be cut by means of thehandle 43 with the engine 28 rotating the disk I is of the-al s I3 and14 at one,- 4 side of the machine are connected bythe link v bar 2|.

42 extend inc'linedly from the I 39 to operate the cutting blades 40,through the shafts H and 32 and belt drive 30. To determine the heightat which the grass will be cut, the levers 2| and 23 are operated toswing the crank axles l3 and I4 through the medium of the lever 24 whichis held in adjusted position by the detent 25 to hold the crank axles inadjusted position. In this manner the blade carrying frame 5 may beraised or lowered as conditions may demand.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the claimed as new is:

invention, what is In a lawn mower, a substantially rectangularshapedframe provided with vertically disposed sleeves at the cornerportlons'thereof, elongated members disposed vertically through thesleeves and each provided with a horizontally disposed sleeve at itslower end and a thrust element at its upper end, axles journaled throughthe horizontal sleeves, each axle being provided with a crank at eachend thereof, wheels for supporting the frame carried by the cranks, aconnecting member between the cranks at one side of the frame, an armextending from one end of one of the axles inwardly of the adjacentcrank, a swingable hand lever provided with rack and detent means, anda, connection between the arm and the said hand lever.

RUDOLPH JOSEPH SEJKORA.

